# 作   者：要努力，努力，再努力
# 开发日期：2022/4/23 23:11
def fun():
    pass


def fun2():
    pass


class Student:
    native_place = '广东'

    def __init__(self, name, age):
        self.name = name
        self.age = age

    def eat(self, name, age):
        self.name = name
        self.age = age

    @classmethod
    def cm(cls):
        pass

    @staticmethod
    def sm():
        pass


a = 10
b = 20
print(a - b)
